[feature]: Show elapsed time per step in the runner output

[faisalishfaq2005]

What problem would this solve?

Each step's result already carries a durationMs field (src/core/claude.ts, ClaudeResult), but the runner output only prints cost. Surface the duration next to it, e.g. ✓ done · $0.31 · 8.2s.

Proposed solution

Where to start: src/commands/run.ts, the onStepFinish reporter (it currently formats only costUsd). StepRun may need to carry durationMs through from the runner in src/core/runner.ts.

Alternatives considered

No response

Scope

• I've checked this isn't already on the roadmap in the README.
• This can't reasonably be expressed as a loop instead of engine code.

[Kanneboinashivakumar]

Hi! I'd like to work on this feature. Could you please assign this issue to me? I plan to propagate durationMs through StepRun and update the runner output to display elapsed time alongside the cost (e.g., ✓ done · $0.31 · 8.2s). Thanks!

[faisalishfaq2005]

Assigned to you @Kanneboinashivakumar , thanks for picking this up! Please include a test, and open a PR referencing this issue (Closes #3). Feel free to ask here if anything's unclear.

[Kanneboinashivakumar]

Hi @faisalishfaq2005 , just a friendly follow-up on this PR whenever you have time. I've completed the requested changes and would appreciate a review. Thank you!

[Kanneboinashivakumar]

Hi @faisalishfaq2005, friendly reminder on PR #17. It's been ready for review for a couple of days now, including the required tests and the changes discussed in this issue. Whenever you have some time, I'd appreciate your feedback or any requested modifications. Thank you!

[Kanneboinashivakumar]

Hi @faisalishfaq2005 👋

Just a friendly follow-up on this PR whenever you have some time.

As requested, I removed the local artifacts, applied the style fixes, and verified that the PR now contains only the intended changes to src/core/runner.ts and src/commands/run.ts. Everything continues to pass locally.

Whenever you're available, I'd appreciate another look. Thanks again for your time and feedback!

[Kanneboinashivakumar]

Hi @faisalishfaq2005 👋

Just a gentle follow-up on PR #17 whenever you have a chance.

The requested changes have been addressed, the tests are included, and I've incorporated the previous review feedback. If there's anything else you'd like me to update, I'd be happy to make the changes.

Thanks again for your time—I appreciate it!